/*
 * Copyright 2016, The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package wt.hpad.utils;

import android.app.Activity;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.util.DisplayMetrics;


/**
 * This provides methods to help Activities load their UI.
 */
public class ActivityUtil {

    /**
     * The {@code fragment} is added to the container view with id {@code frameId}. The operation is
     * performed by the {@code fragmentManager}.
     */
    public static void addFragmentToActivity(@NonNull FragmentManager fragmentManager,
                                             @NonNull Fragment fragment, int frameId) {
/*        checkNotNull(fragmentManager);
        checkNotNull(fragment);*/

        if (fragment != null && fragmentManager != null) {
            FragmentTransaction transaction = fragmentManager.beginTransaction();
            transaction.add(frameId, fragment);
            transaction.commit();
        } else {
            return;
        }
    }

    public static int getScreenHeightDP(Activity activity) {
        DisplayMetrics metrics = new DisplayMetrics();
        activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
        int dp = ActivityUtil.px2dp(activity, metrics.heightPixels);
        return dp;
    }

    public static int getScreenWidthDP(Activity activity) {
        DisplayMetrics metrics = new DisplayMetrics();
        activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
        int dp = ActivityUtil.px2dp(activity, metrics.widthPixels);
        return dp;
    }

    public static int dp2px(Context context, float dipValue) {
        float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dipValue * scale + 0.5f);
    }


    public static int px2dp(Context context, float pxValue) {
        float scale = context.getResources().getDisplayMetrics().density;
        return (int) (pxValue / scale + 0.5f);
    }

}
